infty = 1000;
eps = 0.01;

/*
desticka: 13mm x 50mm, tl. 1.25mm, vyska i s valci 5.25mm
otvor 7.5mm od okraje, prumer 7.5mm, tl. steny tak 1.2-1.5mm
maly otvor prumer 5.5mm, vnejsi 7.9 mm, 5 mm od okraje, roztec 40 mm
*/

difference() {
	union () {
		hull() {
			translate([-7.5/2, 7.75, 5.25/2])
				cube([1.25, 1.25, 5.25], center=true);
			translate([7.5/2, 7.75, 5.25/2])
				cube([1.25, 1.25, 5.25], center=true);
			translate([-12, 7.75, 1.25/2])
				cube([1.25, 1.25, 1.25], center=true);
			translate([12, 7.75, 1.25/2])
				cube([1.25, 1.25, 1.25], center=true);
		};
		translate([-50/2, 0, 0])
			cube([50, 13, 1.25]);
		translate([0, 7.75, 0])
			cylinder(r = (10.2+0.6)/2, h = 5.25);
		for (x = [1, -1]) scale([x, 1, 1]) {
			translate([20, 5, 0]) difference() {
				cylinder(r = (7.9+0.5)/2, h = 5.25);
				cylinder(r1 = 3.5/2, r2 = (5.5+0.7)/2, h = 5.5);
			};
		};
	};

	translate([0, 7.75, -1]) {
		cylinder(r = (7.75+0.6)/2, h = 10);
	};
	for (x = [-17, 17]) rotate([0, 0, x])
		translate([-infty/2, 17, -1])
			cube(infty);
};

/*
difference() {
	cube(10);
	translate([0, 0, -0.5])
		cylinder(r1 = 5, r2 = 10, h =11);
};
*/